By making sure the _events is always an object there is one less check
that needs to be performed by emit.
Use undefined instead of null. typeof checks are a lot faster than
isArray.
There are a few places where the this._events check cannot be removed
because it is possible for the user to call those methods after using
utils.extend to create their own EventEmitter, but before it has
actually been instantiated.
Starting the debugger directly in the SIGUSR1 signal handler results in
a malloc lock contention ~1% of the time. It hangs the test, which is
annoying on a daily basis to all of us, but it also is pretty terrible
if you actually want to debug a node process that has gone sideways.
Credit to @bnoordhuis for most of this. I just added the unref which
keeps it from messing up the event loop for other stuff.
Using external memory values allows for quick communication between js
and cc land, so we can check if the js land callback needs to be run.
(this is where I meant that manually tracking nextTickQueue.length would
be helpful)
Also did some minor cleanup of removing the old Tick and
StartTickSpinner functions, and a few unneeded comments.
Conflicts:
src/node.cc
* Callbacks from spinner now calls its own function, separate from the
tickCallback logic
* MakeCallback will call a domain specific function if a domain is
detected
* _tickCallback assumes no domains, until nextTick receives a callback
with a domain. After that _tickCallback is overridden with the domain
specific implementation.
* _needTickCallback runs in startup() instead of nextTick (isaacs)
* Fix bug in _fatalException where exit would be called twice (isaacs)
* Process.domain has a default value of null
* Manually track nextTickQueue.length (will be useful later)
* Update tests to reflect internal api changes
This reverts commit 0109a9f90a.
Also included: Port all the changes to process._makeCallback into the
C++ version. Immediate nextTick, etc.
This yields a slight boost in several benchmarks. V8 is optimizing and
deoptimizing process._makeCallback repeatedly.
mainly to allow native addons to export single functions on
rather than being restricted to operating on an existing
object.
Init functions now receive exports as the first argument, like
before, but also the module object as the second argument, if they
support it.
Related to #4634
cc: @rvagg
V8 3.15 has new API functions that let you specify the Isolate. V8 and
node.js generally spend 0.5-3.5% of the time in pthread_getspecific(),
looking up the current Isolate. Avoid that overhead by making "our"
isolate global so we can pass it around. The change to the new API is
introduced in follow-up commits.
This adds a process._fatalException method which is called into from
C++ in order to either emit the 'uncaughtException' method, or emit
'error' on the active domain.
The 'uncaughtException' event is an implementation detail that it would
be nice to deprecate one day, so exposing it as part of the domain
machinery is not ideal.
Fix#4375
Remove the idle garbage collector. Its purpose was to run the garbage collector
when the application is idle but it never worked quite right. Many people have
complained over the years that with heaps > 128 MB, a node.js process never
sleeps anymore; instead, it spends nearly 100% of its CPU time trying to
collect garbage.
Back in the old days, idle GC probably was a good idea. But with V8's current
incremental collector, idle gc appears to offer no time or space benefits
whatsoever and indeed seems actively harmful. Remove it.
Fixes#3870.
Before this commit, DecodeWrite() mistakenly tried to convert buffers to
UTF-8 strings which:
a) produced invalid character sequences when the buffer contained
octets > 127, and
b) lead to spurious test failures because DecodeWrite() wrote less bytes
than DecodeBytes() said it would, with the remainder either containing
zeros or garbage
Fix that by simply copying the buffer's data to the target buffer when the
encoding is BINARY or by converting the buffer to a binary string when it's
UTF8 or ASCII.
Fixes#3651, #3866.
